Should Edwin Jackson pick up the win tonight, the Nationals would have five starters with double-digit win totals. Not too shabby. It'll be Jackson against Brewers right-hander Shaun Marcum tonight at Nats Park. Marcum is 5-4 with a 3.91 ERA this season. For the Nats: RF Jayson Werth CF Bryce Harper 3B Ryan Zimmerman 1B Adam LaRoche LF Michael Morse SS Ian Desmond 2B Danny Espinosa C Jesus Flores P Edwin Jackson For the Brewers: RF Norichika Aoki 2B Rickie Weeks LF Ryan Braun 3B Aramis...Should Edwin Jackson pick up the win tonight, the Nationals would have five starters with double-digit win totals. Not too shabby. It'll be Jackson against Brewers right-hander Shaun Marcum tonight at Nats Park. Marcum is 5-4 with a 3.91 ERA this season. For the Nats: RF Jayson Werth CF Bryce Harper 3B Ryan Zimmerman 1B Adam LaRoche LF Michael Morse SS Ian Desmond 2B Danny Espinosa C Jesus Flores P Edwin Jackson For the Brewers: RF Norichika Aoki 2B Rickie Weeks LF Ryan Braun 3B Aramis Ramirez C Jonathan Lucroy 1B Travis Ishikawa CF Carlos Gomez SS Jean Segura P Shaun Marcum